begin Titan protocol implementation

src/app/browser/window/tab/item/page/input/titan/control.rs

@@ -0,0 +1,47 @@
+mod counter;
+mod send;
+mod widget;
+
+use counter::Counter;
+use send::Send;
+use widget::Widget;
+
+use gtk::gio::SimpleAction;
+use std::rc::Rc;
+
+pub struct Control {
+    pub counter: Rc<Counter>,
+    pub send: Rc<Send>,
+    pub widget: Rc<Widget>,
+}
+
+impl Control {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(action_send: SimpleAction) -> Self {
+        // Init components
+        let counter = Rc::new(Counter::new());
+        let send = Rc::new(Send::build(action_send));
+
+        // Init widget
+        let widget = Rc::new(Widget::build(&counter.widget.label, &send.widget.button));
+
+        // Return activated struct
+        Self {
+            counter,
+            send,
+            widget,
+        }
+    }
+
+    // Actions
+    pub fn update(&self, bytes: Option<usize>) {
+        // Update children components
+        self.counter.update(bytes);
+        self.send.update(match bytes {
+            Some(left) => left > 0,
+            None => false,
+        });
+    }
+}

src/app/browser/window/tab/item/page/input/titan/control/counter.rs

@@ -0,0 +1,29 @@
+mod widget;
+
+use widget::Widget;
+
+use std::rc::Rc;
+
+pub struct Counter {
+    pub widget: Rc<Widget>,
+}
+
+impl Default for Counter {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl Counter {
+    // Construct
+    pub fn new() -> Self {
+        Self {
+            widget: Rc::new(Widget::new()),
+        }
+    }
+
+    // Actions
+    pub fn update(&self, bytes: Option<usize>) {
+        self.widget.update(bytes);
+    }
+}

src/app/browser/window/tab/item/page/input/titan/control/counter/widget.rs

@@ -0,0 +1,31 @@
+use gtk::{prelude::WidgetExt, Label};
+
+pub struct Widget {
+    pub label: Label,
+}
+
+impl Default for Widget {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl Widget {
+    // Construct
+    pub fn new() -> Self {
+        Self {
+            label: Label::builder().css_classes(["dim-label"]).build(), // @TODO `.dimmed` Since: Adw 1.7
+        }
+    }
+
+    // Actions
+    pub fn update(&self, bytes: Option<usize>) {
+        match bytes {
+            Some(value) => {
+                self.label.set_label(&crate::tool::format_bytes(value));
+                self.label.set_visible(value > 0);
+            }
+            None => self.label.set_visible(false),
+        }
+    }
+}

src/app/browser/window/tab/item/page/input/titan/control/send.rs

@@ -0,0 +1,27 @@
+mod widget;
+use widget::Widget;
+
+use gtk::gio::SimpleAction;
+use std::rc::Rc;
+
+pub struct Send {
+    pub widget: Rc<Widget>,
+}
+
+impl Send {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(action_send: SimpleAction) -> Self {
+        // Init widget
+        let widget = Rc::new(Widget::build(action_send));
+
+        // Result
+        Self { widget }
+    }
+
+    // Actions
+    pub fn update(&self, is_sensitive: bool) {
+        self.widget.update(is_sensitive);
+    }
+}

src/app/browser/window/tab/item/page/input/titan/control/send/widget.rs

@@ -0,0 +1,38 @@
+use gtk::{
+    gio::SimpleAction,
+    prelude::{ActionExt, ButtonExt, WidgetExt},
+    Button,
+};
+
+pub struct Widget {
+    pub button: Button,
+}
+
+impl Widget {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(action_send: SimpleAction) -> Self {
+        // Init main widget
+        let button = Button::builder()
+            .css_classes(["accent"]) // | `suggested-action`
+            .label("Send")
+            .sensitive(false)
+            .build();
+
+        // Init events
+        button.connect_clicked({
+            move |_| {
+                action_send.activate(None);
+            }
+        });
+
+        // Return activated `Self`
+        Self { button }
+    }
+
+    // Actions
+    pub fn update(&self, is_sensitive: bool) {
+        self.button.set_sensitive(is_sensitive);
+    }
+}

src/app/browser/window/tab/item/page/input/titan/control/widget.rs

@@ -0,0 +1,27 @@
+use gtk::{prelude::BoxExt, Align, Box, Button, Label, Orientation};
+
+const SPACING: i32 = 8;
+
+pub struct Widget {
+    pub g_box: Box,
+}
+
+impl Widget {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(limit: &Label, send: &Button) -> Self {
+        // Init main widget
+        let g_box = Box::builder()
+            .halign(Align::End)
+            .orientation(Orientation::Horizontal)
+            .spacing(SPACING)
+            .build();
+
+        g_box.append(limit);
+        g_box.append(send);
+
+        // Return new `Self`
+        Self { g_box }
+    }
+}

src/app/browser/window/tab/item/page/input/titan/form.rs

@@ -0,0 +1,21 @@
+mod widget;
+
+use widget::Widget;
+
+use gtk::gio::SimpleAction;
+use std::rc::Rc;
+
+pub struct Form {
+    pub widget: Rc<Widget>,
+}
+
+impl Form {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(action_update: SimpleAction) -> Self {
+        Self {
+            widget: Rc::new(Widget::new(action_update)),
+        }
+    }
+}

src/app/browser/window/tab/item/page/input/titan/form/widget.rs

@@ -0,0 +1,62 @@
+use gtk::{
+    gio::SimpleAction,
+    prelude::{ActionExt, TextBufferExt, TextViewExt, WidgetExt},
+    TextView, WrapMode,
+};
+use libspelling::{Checker, TextBufferAdapter};
+use sourceview::Buffer;
+
+const MARGIN: i32 = 8;
+
+pub struct Widget {
+    pub text_view: TextView,
+}
+
+impl Widget {
+    // Construct
+    pub fn new(action_update: SimpleAction) -> Self {
+        // Init [SourceView](https://gitlab.gnome.org/GNOME/gtksourceview) type buffer
+        let buffer = Buffer::builder().build();
+
+        // Init [libspelling](https://gitlab.gnome.org/GNOME/libspelling)
+        let checker = Checker::default();
+        let adapter = TextBufferAdapter::new(&buffer, &checker);
+        adapter.set_enabled(true);
+
+        // Init main widget
+        let text_view = TextView::builder()
+            .bottom_margin(MARGIN)
+            .buffer(&buffer)
+            .css_classes(["frame", "view"])
+            .extra_menu(&adapter.menu_model())
+            .left_margin(MARGIN)
+            .margin_bottom(MARGIN / 4)
+            .right_margin(MARGIN)
+            .top_margin(MARGIN)
+            .wrap_mode(WrapMode::Word)
+            .build();
+
+        text_view.insert_action_group("spelling", Some(&adapter));
+
+        // Init events
+        text_view.buffer().connect_changed(move |_| {
+            action_update.activate(None);
+        });
+
+        text_view.connect_realize(move |this| {
+            this.grab_focus();
+        });
+
+        // Return activated `Self`
+        Self { text_view }
+    }
+
+    // Getters
+
+    pub fn size(&self) -> usize {
+        let buffer = self.text_view.buffer();
+        buffer
+            .text(&buffer.start_iter(), &buffer.end_iter(), true)
+            .len()
+    }
+}

src/app/browser/window/tab/item/page/input/titan/title.rs

@@ -0,0 +1,20 @@
+mod widget;
+
+use widget::Widget;
+
+use std::rc::Rc;
+
+pub struct Title {
+    pub widget: Rc<Widget>,
+}
+
+impl Title {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(title: Option<&str>) -> Self {
+        Self {
+            widget: Rc::new(Widget::build(title)),
+        }
+    }
+}

src/app/browser/window/tab/item/page/input/titan/title/widget.rs

@@ -0,0 +1,27 @@
+use gtk::{prelude::WidgetExt, Align, Label};
+
+pub struct Widget {
+    pub label: Label,
+}
+
+impl Widget {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(title: Option<&str>) -> Self {
+        let label = Label::builder()
+            .css_classes(["heading"])
+            .halign(Align::Start)
+            .visible(false)
+            .build();
+
+        if let Some(value) = title {
+            if !value.is_empty() {
+                label.set_label(value);
+                label.set_visible(true)
+            }
+        }
+
+        Self { label }
+    }
+}

src/app/browser/window/tab/item/page/input/titan/widget.rs

@@ -0,0 +1,30 @@
+use gtk::{prelude::BoxExt, Box, Label, Orientation, TextView};
+
+const MARGIN: i32 = 6;
+const SPACING: i32 = 8;
+
+pub struct Widget {
+    pub g_box: Box,
+}
+
+impl Widget {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(title: &Label, response: &TextView, control: &Box) -> Self {
+        let g_box = Box::builder()
+            .margin_bottom(MARGIN)
+            .margin_end(MARGIN)
+            .margin_start(MARGIN)
+            .margin_top(MARGIN)
+            .spacing(SPACING)
+            .orientation(Orientation::Vertical)
+            .build();
+
+        g_box.append(title);
+        g_box.append(response);
+        g_box.append(control);
+
+        Self { g_box }
+    }
+}